Is there a way for you to change the colors of the outlines ? I tried different values by editing the

<variable value="0 0.8 1" type="vector3" name="contour_color"/>
<variable value="0 0.8 1" type="scalar" name="contour_opacity"/>

because I want Mu, Cs and Hcl ingredients to have red, blue and green outlines respectively.

But it doesnt work.